Why are the elements at the bottom of the periodic table?

Answers

Answer 1

Answer:

Electron configurations

Explanation:

answer


Related Questions

I need help answer whenever I have time

Answers

Answer:

Lithosphere: Volcanos..

Hydrosphere: Rain falls..

biosphere: Plants..

Explanation:

As the girl leaves her room, she flips the switch to turn off the light. Turning off the light make
A :a closed circuit
B :a series circuit
C :a parallel circuit
D :an open circuit

Answers

Answer:

A.

Explanation:

How many grams of carbon dioxide are produced from the combustion of 250.G of ethane, C3H8 in the reaction C3H8 +5O2 - 3CO2 +4H2O

Answers

Answer:

750 g of CO₂

Explanation:

The balanced equation for the reaction is given below:

C₃H₈ + 5O₂ —> 3CO₂ + 4H₂O

Next, we shall determine the mass of C₃H₈ that reacted and the mass of CO₂ produced from the balanced equation. This can be obtained as follow:

Molar mass of C₃H₈ = (12×3) + (8×1)

= 36 + 8 = 44 g/mol

Mass of C₃H₈ from the balanced equation = 1 × 44 = 44 g

Molar mass of CO₂ = 12 + (16×2)

= 12 + 32 = 44 g/mol

Mass of CO₂ = 3 × 44 = 132 g

SUMMARY:

From the balanced equation above,

44 g of C₃H₈ reacted to produce 132 g of CO₂.

Finally, we shall determine the mass of CO₂ produced by the reaction of 250 g of C₃H₈. This can be obtained as follow:

From the balanced equation above,

44 g of C₃H₈ reacted to produce 132 g of CO₂.

Therefore, 250 g of C₃H₈ will react to produce = (250 × 132)/44 = 750 g of CO₂.

Thus, 750 g of CO₂ were obtained from the reaction.

The number of grams of carbon dioxide should be 750 grams.

Calculation of the no of grams:

Since

The balanced equation for the reaction is

C₃H₈ + 5O₂ —> 3CO₂ + 4H₂O

Now

Molar mass of C₃H₈ = (12×3) + (8×1)

= 36 + 8 = 44 g/mol

Hence, Mass of C₃H₈ from the balanced equation = 1 × 44 = 44 g

Now

Molar mass of CO₂ = 12 + (16×2)

= 12 + 32 = 44 g/mol

Hence, Mass of CO₂ = 3 × 44 = 132 g

Now the no of grams should be

= (250 × 132)/44

= 750 g of CO₂.

Learn more about reaction here: https://brainly.com/question/4417455

What is the tertiary consumer in this food chain?
A hawk
B lettuce
C snail
D thrush

Answers

Answer:

the hawk

Explanation:

in order it would be: producer, primary, secondary, tertiary

Answer:

the hawk is the tertiary consumer

The image shows two spheres hung from a thin rope. The spheres do not affect each other.
What is most likely true about these spheres?

-Both spheres are neutral.
-Both spheres have a positive charge.
-Both spheres have a negative charge.
-One sphere has a positive charge, and the other has a negative charge.

Answers

Answer:

both spheres have a positive charge

Name the gas that the limewater in the flask is testing for.

Answers

Answer:

Explanation:

Carbon dioxide is the answer I think.

Hope it helps...

What is a reducing agent?​

Answers

Answer: Its an element or compound that loses (or "donates") an electron to an electron recipient (oxidizing agent) in a redox chemical reaction.

CREDIT: Wikipedia

Answer:A reducing agent typically is in one of its lower possible oxidation states and is known as the electron donor.

Example: Examples of reducing agents include the earth metals, formic acid, oxalic acid, and sulfite compounds.

Calculate the given mass in 0.5 mol. Of CH4 

Answers

Answer:

8 grams

Explanation:

The molar mass of CH4 is about 16 grams per mol.  So you get the answer by mutlitplying 0.5 by 16, (cancel out moles by placing 1 on the bottom of the fraction).

Answer:

8 (g)

Explanation:

[tex]m= n * M[/tex]

m= 0.5*(12+1*4)=0.5*16 =8 (g)

Which is the conjugate acid of HSO4

Answers

Answer:

sulfuric acid

Explanation:

The conjugate acid of HSO4 -1 is H2 SO4. Adding one hydrogen ion to the hydrogen sulfate ion generates the conjugate acid. Its name is sulfuric acid.

The net force of a vehicle that is accelerating at a rate of 1.5 m/s2 is 1,800 newtons. What is the mass of the vehicle to the nearest kilogram?

Answers

Answer:

1.2kg or 1200kg

Explanation:

F = ma

net force = 1,800

m = ??

a = 1.5m/s^2

m = F/a = 1,800/1.5 or 1,800 x 10/1.5 x 10

= 18,000/15 = 1,200kg or 1.2kg

Thanks

Where are the places these minerals are found: Gold, Limestone and kaiolin.

Answers

Explanation:

Gold: The Kolar Gold Fields in Kolar used to be one of the major producers of gold in India, before it shut down. Presently the gold mines of Hutti and Raichur produce almost 84 per cent of the country’s gold. The other major centers of gold mining are Dharwad and Chitradurga. The gold mines produce about 3,000 kg’s of gold per annum. The district of Raichur is also famous for its silver deposits.

Limestone: It is another important mineral with an estimated 51,000 million tons. Karnataka has the largest limestone reserve in India. The districts of Gulbarga, Bagalkot, Belgaum, Shimoga and other Uttara Kannada districts are endowed with extensive high grade limestone. The present and consistent production of approximately 14 million tonnes provides for the cement plants in these districts.

China clay (kaolin) consisting dominantly of kaolinite is one of the most sophisticated industrial minerals with a host of applications, viz., in ceramics, refractories, paper coating, filler for rubber, insecticides, cement, paint, textiles, fertilizers and others including abrasives, asbestos products, fibreglass, chemicals, cosmetics, pharmaceuticals, electrical ware, foundry and glass.

The Department of Mining and Geology through their past investigation campaigns in parts of Kerala,identified two major china clay zones viz., the southern china clay zone between Thiruvananthapuram and Kundara (Thiruvananthapuram and Kollam districts) and the northern china clay zone between Kannapuram Madayi -Cheruthazham in Kannur district to Nileswarm - Manjeshwaram in Kasargod district. An estimated reserve of 172 million tonnes (probable reserve of 80 million tonnes and possible reserve of 92 million tonnes) of china clay of sedimentary and residual origin has been arrived at.

Kerala china clay is one of the finest quality clay and is world class. In fact, Kaolin marketed by English Indian Clays Ltd. (EICL), Thiruvananthapuram claims to have similar or even better properties compared to imported clays.

Hope it's help you

Mark me as a brilliant

What happens with electrons when atoms form covalent bonds?

Answers

Answer:

Covalent bonding occurs when pairs of electrons are shared by atoms. Atoms will covalently bond with other atoms in order to gain more stability, which is gained by forming a full electron shell. By sharing their outer most (valence) electrons, atoms can fill up their outer electron shell and gain stability.

Explanation:

In the following reaction, in which direction, left or right, will the equilibrium shift if the following changes are made?

2NO (g) + H2 (g) ⇌ N2O (g) + H2O (g) + 36 kJ (heat)

N2 O (g) is added
Equilibrium shifts (LEFT / RIGHT)
H2 (g) is added
Equilibrium shifts (LEFT / RIGHT)

Answers

Answer:

Shifts to the left.

Shifts to the right.

Explanation:

Based on Le Châtelier's principle, when a change occurs in a system in equilibrium, the system will try to counteract the change that was made.

In the equilibrium:

2NO (g) + H₂ (g) ⇌ N₂O (g) + H₂O (g) + 36 kJ (heat)

If N₂O is added, the equilibrium shifts to the left trying to decrease the concentration of N₂O added.

If H₂ is added, the equilibrium shifts to the right trying to decrease the concentration of H₂ added

How can water affect the rock cycle?

Water can cause rocks to break into sediments through mechanical weathering.
Water can cause rocks to be buried deep underground.
Water can cause rocks to melt.
Water can causer rocks to break into sediments through chemical weathering.

Answers

Answer:

b

Explanation:

b because it's a physical change

How do we designate recessive
genes?
A. They are male.
B. They are lower case letters.
C. They are female.
D. They are capital letters.

Answers

The answer to your question is B. They are lower case letters...

Which reaction would cause an increase in entropy?

Answers

to be honest it have to be c because it shows things

Answer:

The other guy is completely wrong.

The answer is B.SO2CI2 (g) > SO2 (g)+CI2(g)

Explanation:

A P E X

Write a short paragraph about how gases are all around you. Provide at least 2 examples ​

Answers

Answer:fart and carbon are all around is

Explanation:

We are constantly breathing in different types of gasses. There's oxygen in the air we breathe that comes from trees. There is hydrogen in the higher atmospheres.

The pH of a solution can be determined by using a

A. Filter paper

B. Potentiometer

C. Thermometer

D. pH paper

real answers plz not bots

Answers

B is the right answer

Write word equation of sodium reacts with chlorine to get sodium chloride

Answers

Answer:

Na+ + Cl-=NaCl

Explanation:

Sodium have +ions while Chlorine have - ions the ions will cancel and it will equal to NaCl

Convert 812.4 kPa into atm

Answers

Answer:

Explanation:

There are a series of unit used to measure PRESSURE. They include millimetre mercury (mmHg), atmospheric pressure (atm), kilopascal etc. These units of measurement are interconvertible i.e. can be changed from one unit to another.

Based on this question asking to convert

1 kilopascal = 0.00986923atm

How many moles of F2 are required to produced 8.3 moles of HF

Answers

The answers?? Are Whichhhh

calculate the number of atoms in 112 g of iron.​

Answers

Answer:

1 mole of iron (Fe) = 56 g (molar mass)

Since 56 g of iron = 1 mol.

Therefore, 112 g of iron= 1/ 56 ×112 mol = 2 mol.

Explanation:

How are plate tectonics and the rock cycle connected? Select the best answer from the choices below.

a
The rock cycle keeps the plates from moving too far apart
b
Igneous rocks that form from magma are a major part of the rock cycle
c
The heat from the mantle that fuels plate tectonics also drives the rock cycle
d
Plate tectonics causes sedimentary rocks to turn into metamorphic rocks

Answers

the correct answer is the option c

A gas has a volume of 10.0 L at 20 degree Celsius. At what temperature does the gas have a volume of 20.0 L ?

Answers

Answer:

286 K

Explanation:

From the question,

Applying Charles law,

V/T = V'/T'.................... Equation 1

Where V = Initial Volume of gas, T = Initial Temperature of gas in Kelvin, V' = Final Volume of gas, T' = Final Temperature of gas in Kelvin

Make T' the subject of the equation

T' = V'T/V.................. Equation 2

Given: V = 10.0 L, V' = 20.0 L, T = 20°C  = (20+273) = 293 K.

Substitute these values into equation 2

T' = (20×293)/10

T' = 586 K

Hence the temperature of the gas is 586 K

Convert 544 Calories to Joule

Answers

Answer:

2276.1 Joules

Explanation

One calorie is equal to 4.184 Joules. So, 544 calories will be equal to 544*4.184=2276.1 Joules

2276096 joules


multiply the energy value by 4184

A sealed container is heated from 110K to 175K. The gas begins at a volume of 95L, what is the new volume of the gas upon heating?

Answers

151 L

V1/T1 = V2/T2
V1 = 95 L
T1 = 110 K
T2 = 175 K

Solve the equation for V2 —> V2 = V1T2/T1

V2 = (95 L)(175 K) / (110 K) = 151 L

Sn(IV) and Br
chemical formula

Answers

the chemical is SnBr4 I’m pretty sure

Can you use carbon dioxide in the dark

Answers

Answer:

If you already have a solenoid, there is nothing wrong with running CO2 with the lights only. It will save CO2, and prevent excessive CO2 levels at night. Some think the CO2 should be up to max levels when the lights go on.

Explanation:

What change in volume results if 75.0 mL of gas is cooled from 100.0 °C
to 0.00 °C

Answers

Answer:

Final volume v2 = 0 ml

Explanation:

Given:

Initial temperature = 100°C

Initial volume = 75 ml

Final temperature = 0°C

Find:

Final volume

Computation:

Using Charles law formula;

⇒ V1 / T1 = V2 / T2

Where

⇒ Initial temperature = T1

⇒ Initial volume = V1

⇒ Final temperature = T2

⇒ Final volume = V2

So,

⇒ 75 / 100 = V2 / 0

Final volume v2 = 0 ml

HELP PLEASE!
The more bonds an atom can make, the more likely it is to combie with other atoms in different ways.
Which element is most likely able to make the greatest variety of bonds?
a. nitrogen
b. hydrogen
c. oxygen
d.carbon

Answers

Answer: a. nitrogen

Explanation:

Nitrogen comprises of five valence electrons in its outermost shell which enables it to form triple, double and single bonds with other atoms. It can share three electrons with other nitrogen atom and form a covalent bond. Moreover, nitrogen can form multiple bonds with itself and with other elements due to its small size and high electronegativity. Nitrogen, carbon, fluorine, and oxygen are the elements with which nitrogen can form bonding.

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